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Finding the Fourth Proportional to 324,007.80, 486,011.70 and 257,085.60

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Solution

The fourth proportional to 324,007.80, 486,011.70 and 257,085.60 is: 385,628.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,007.80 : 486,011.70 = 257,085.60 : x
  2. Step 2: Convert to fraction form
    324,007.80/486,011.70 = 257,085.60/x
  3. Step 3: Cross multiply
    324,007.80x = 486,011.70 × 257,085.60
  4. Step 4: Simplify right side
    324,007.80x = 124,946,609,501.52
  5. Step 5: Solve for x
    x = 124,946,609,501.52/324,007.80
  6. Step 6: Final answer
    x = 385,628.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.